let's building the city for the better of the school choice movement it is here to stay. john: in addition, more good news this time from internet. will blob should be worried, because look at how excited these kids are about math. john: do your kids have a good teacher? how do you know? maybe the teacher next door is better? maybe there is a better teacher in a different state, maybe there is a world's best teacher or several. it would be great if your kids had that teacher. today, you can. >> i got it. woo! yeah. 92 these kids are -- >> these kids are this excited about a mag web site. >> we're done. >> it out the me a lot. john: 5 years ago hedge fund analyst sal khan created videos like this to tutor his cousin. >> it worked out well. i had a friend say said, sal put your lectures on youtube, i gave it a shot. >> welcome to presentation on basic addition. john: thousands watched his lectures. >> i got letters from people, and comments on youtube, they are -- they are not like, hey i think this kind of might have helped, they are like, i got a -- i faileed calculus the